Bedotia marojejy 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Actinopterygii Atheriniformes Bedotiidae

Scientific Name: Bedotia marojejy Stiassny & Harrison, 2000

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(iii,v)+2ab(iii,v) ver 3.1
Year Published: 2016
Date Assessed: 2016-05-26
Assessor(s): Ravelomanana, T.
Reviewer(s): Randrianizahaisa, H., Rasoloariniaina, R & Velosoa, J.
Contributor(s): Loiselle, P.V. & Participants of the CBSG/ANGAP CAMP "Faune de Madagascar" workshop, Mantasoa, Madagascar 2001
Facilitator/Compiler(s): Darwall, W.R.T.
The species estimated AOO is 32 km² and EOO is to 374 km². The river condition is also declining due to deforestation, in particular for rosewood. The introduced Xiphoporus helleri is also having a negative impact on this species leading to an ongoing population decline. Based on  these threats the species is restricted to a single location. The species therefore qualifies as Endangered under B1 and B2.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is endemic to Madagascar. Currently it is known only from the type locality in the Manantenina River an affluent of Lokoho river (Stiassny and Harrison 2000).
Countries occurrence:
Additional data:
Estimated area of occupancy (AOO) - km2:32
Number of Locations:1
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:A significant decline in the population has been noticed.
Current Population Trend:Decreasing
Additional data:
Continuing decline of mature individuals:Yes

Habitat and Ecology [top]

Habitat and Ecology:It is known from the Lokoho river basin.
Continuing decline in area, extent and/or quality of habitat:Yes
Movement patterns:Not a Migrant

Use and Trade [top]

Use and Trade: Over the last decade the use of mosquito nets is becoming common in Madagascar. This method of fishing is used by young people or the ladies to catch this species for local consumption use.

Threats [top]

Major Threat(s): Habitat degradation through siltation caused by deforestation in unprotected areas is the main threat to this species. In particular this is a result of exploitation of rosewood which is also transported down the river at which time additional sediments are deposited into the system. A recent survey (Ravelomanana pers. obs.) found that Bedotia marojejy is declining. Xiphophorus helleri is taking over this species possibly due to predation on the eggs.

Conservation Actions [top]

Conservation Actions: The range extends into Marojejy National Park. The park serves to protect limnological integrity of the upper and middle Lokoho by preserving the basin’s forested watershed. efforts should be made to stop the spread of Xiphophorus helleri into other parts of the species range.

Citation: Ravelomanana, T. 2016. Bedotia marojejy. The IUCN Red List of Threatened Species 2016: e.T44465A58306140. . Downloaded on 24 September 2018.
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